Just make your own box like a usb hub ... one button for power for all, and one button for each connector data wires - the kind of push button that's like on ball point pens, stays depressed until you press it again.
Configure it so that when you press the button the connector's data wires (tx and rx) are connected to the cable that goes in the TV.
Have one push button that connects voltage and ground wires to all connectors (all connectors powered but only one connector's data wires are connected at any time)
So you can simply plug multiple things in your box and switch between them like this:
release the button for power (turns off all connectors)
release button for data for previous connector
push button for data wires for new connector
push button to power everything
You can make all this easier with 5v relays (with 2 circuits each, and ideally latching for lowest power if you'll power everything from tv's usb port) and a microcontroller and a plain button for each connector. The micro can disable power, disable old connector, enable new connector, turn on power (like when you'd manually extract device from usb connector). Could also have a led for each connector to know which connector is active...